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In Vivo Calcium Imaging of Taste-Induced Neural Responses in Adult Drosophila
Published on: March 7, 2025
Evolutionary differences in food preference rely on Gr64e, a receptor for glycerol
Zev Wisotsky1, Adriana Medina, Erica Freeman
1Interdepartmental Neuroscience Program, University of California, Riverside, California, USA.
Nature Neuroscience
|November 8, 2011
Summary
Researchers discovered a gustatory receptor, Gr64e, crucial for Drosophila
Area of Science:
- * Molecular biology
- * Neuroscience
- * Animal behavior
Background:
- * The mechanisms by which non-sugar stimuli, like beer, elicit gustatory responses in Drosophila are poorly understood.
- * Fermenting yeast and its products represent a significant food source for many Drosophila species.
Purpose of the Study:
- * To identify the molecular receptors responsible for detecting yeast-derived compounds in Drosophila.
- * To investigate the role of identified receptors in feeding behavior and sensory perception.
Main Methods:
- * Utilized genetic screening to identify gustatory receptors involved in feeding preference.
- * Performed behavioral assays to assess feeding responses to glycerol and yeast products.
- * Employed ectopic gene expression to study receptor function in heterologous systems.
Main Results:
- * Identified Gr64e as a key gustatory receptor required for preference towards beer and yeast-containing substances.
- * Demonstrated that Gr64e mediates neuronal and behavioral responses to glycerol, a major component of yeast fermentation.
- * Observed reduced glycerol sensitivity in Drosophila species with Gr64e pseudogenes, suggesting evolutionary adaptation.
Conclusions:
- * Gr64e is a molecular receptor for glycerol, mediating the attraction to yeast fermentation products in Drosophila.
- * This finding sheds light on the molecular basis of feeding acceptance of yeast-derived food sources.
- * Gr64e may play a role in the evolutionary divergence of feeding preferences among Drosophila species.
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